The Collaborative International Dictionary
Mourning \Mourn"ing\, a.
Grieving; sorrowing; lamenting.
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Employed to express sorrow or grief; worn or used as appropriate to the condition of one bereaved or sorrowing; as, mourning garments; a mourning ring; a mourning pin, and the like.
Mourning bride (Bot.), a garden flower ( Scabiosa atropurpurea) with dark purple or crimson flowers in flattened heads.
Mourning dove (Zo["o]l.), a wild dove ( Zenaidura macroura) found throughout the United States; -- so named from its plaintive note. Called also Carolina dove. See Illust. under Dove.
Mourning warbler (Zo["o]l.), an American ground warbler ( Geothlypis Philadelphia). The male has the head, neck, and chest, deep ash-gray, mixed with black on the throat and chest; other lower parts are pure yellow.
Wikipedia
Scabiosa atropurpurea, the mourningbride or sweet scabious, is an ornamental plant of Scabiosa genus in the Caprifoliaceae family.